电介质
之字形的
材料科学
弹性体
链条(单位)
灵活性(工程)
模数
介电弹性体
极地的
介电常数
聚合物
化学物理
单体
复合材料
纳米技术
高分子化学
光电子学
化学
物理
天文
统计
数学
几何学
作者
Yifu Chen,Siwu Wu,Jianguo Mi,Ming Tian,Liang Ming-ying,Jialiang Chen,Zhenghai Tang,Wenjie Wu,Baochun Guo,Liqun Zhang
标识
DOI:10.1021/acs.macromol.3c01683
摘要
Decorating the backbone of dielectric elastomers (DEs) with polar functionalities is an important practice that increases the total charge quantity of the chain segments, allowing DEs to have high dielectric permittivity (ε′). However, most established methods have struggled with optimizing the electromechanical performance of DEs, as the interactions among their polar functionalities have inevitably deteriorated the network flexibility of DEs. Herein, we present an innovative design concept for homogeneous DEs with superior dielectric properties by incorporating angle-containing monomers as building blocks that enable a flexible “zigzag” chain configuration in the DEs. This configuration, in turn, facilitates the charge separation within the chain segments. Therefore, a substantial increase of ε′ (∼90%) can be achieved while reducing the corresponding Young’s modulus, enabling superior and dynamically stable actuation performance in DEs. These findings have the potential to break the longstanding trade-off between dielectric and mechanical performances of conventional DEs upon chemical decorations.
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